The World Junior Curling Championships (WJCC) is an annual international curling championship for players under 21 years of age 

The tournament has taken place since 1975 for men and since 1988 for women. The championship includes ten women's and ten men's teams who compete against each other for the two respective titles. 

Both the women's and men’s championships take place at the same venue, on alternate draws. The countries who take part in the World Junior Curling Championships are determined partly on ranking from the previous championship but also on a regional basis (which determines the number of European and Pacific teams which will take part). 

The Championship usually lasts over an eight day period, with one day of training at the championship venue prior to the beginning of competition. 

Five days of round robin games (each team plays each other once) then take place before the top four ranked teams move onto the final knockout stages in the remaining two days of competition. 

The format of the knockout stages is played in a page play-off system (1 v 2 and 3 v 4) with the winner of the 1 v 2 game moving to the Gold Medal game and the loser dropping to the semi-final. The winner of the 3 v 4 game progresses to the semi-final while the loser drops to the Bronze Medal game and must await for the result of the semi-final, where they will take on the loser. 

The winner of the semi-final will move onto the Gold Medal game. This is an incentive to finish as high in the rankings as possible to gain an ‘extra life’ by finishing in either 1st or 2nd position in the round robin rankings.

Since the beginning of the World Junior Curling Championships, Scottish Men’s teams have won gold on eight occasions and women's have won gold seven times. Eve Muirhead and Sarah Macintyre of Scotland hold the record for the most World Junior titles won, having won the championship in 2007, 2008 and 2009.